This test will end in error!
#include env.asap
#include define1.asap
#include define2.asap
#include define3.asap
#define EXT asap
#eval #include eval.EXT
#define FILENAME include1
#eval #include FILENAME.EXT
#define FILENAME quote
#eval #include FILENAME.asap
#include undef.asap
#eval #include FILENAME.EXT